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Positive Feedback - Anatomy & Physiology (view source)
Revision as of 16:57, 3 September 2008
, 16:57, 3 September 2008New page: {{toplink |backcolour = FAFAD2 |linkpage =Endocrine System - Anatomy & Physiology |linktext =Endocrine System |maplink = Endocrine System (Content Map) - Anatomy & Physiology |pagetype =An...
{{toplink
|backcolour = FAFAD2
|linkpage =Endocrine System - Anatomy & Physiology
|linktext =Endocrine System
|maplink = Endocrine System (Content Map) - Anatomy & Physiology
|pagetype =Anatomy
}}
<br>
== Positive Feedback==
Positive feedback systems are rare.
They occur when secretion of a hormone ''increases'' in response to feedback from an organ, creating an amplification process.
==Example==
The hormone [[Pituitary Gland - Anatomy & Physiology#Oxytocin|'''Oxytocin''']] causes uterine contraction. During parturition, the uterus stretches. The stretch causes nerve impulses to send signals to the hypothalamus, increasing the oxytocin levels released. This in turn increases uterine contraction, and the cycle continues.
|backcolour = FAFAD2
|linkpage =Endocrine System - Anatomy & Physiology
|linktext =Endocrine System
|maplink = Endocrine System (Content Map) - Anatomy & Physiology
|pagetype =Anatomy
}}
<br>
== Positive Feedback==
Positive feedback systems are rare.
They occur when secretion of a hormone ''increases'' in response to feedback from an organ, creating an amplification process.
==Example==
The hormone [[Pituitary Gland - Anatomy & Physiology#Oxytocin|'''Oxytocin''']] causes uterine contraction. During parturition, the uterus stretches. The stretch causes nerve impulses to send signals to the hypothalamus, increasing the oxytocin levels released. This in turn increases uterine contraction, and the cycle continues.